THE PRODUCTION OF HONEY. 
473 
Few are aware of the tremendous centrifugal force 
accompanying high velocities, its increase being in 
the ratio of the square of the rate. Combs, always 
relatively tender, may be, in consequence, extracted 
without damage, while, at an apparently slightly 
greater pace, they are wrecked. The subjoined 
Table* will make this clear. The highest rate given 
is much beyond the endurance of any but the very 
hardest combs, and is never required, thick honey 
leaving, even in a cool atmosphere, when the pres- 
sure equals four times or five times the weight, z>., 
the 2 olbs. or 25lbs. of the Table ; but I have seen 
geared machines most needlessly driven much beyond 
* Table of Pressures made by Comb of 
51b. weight against wire net 
of Extractor 
working at Gin. from 
centre of spindle. 
Pressure. 
Velocity 
per sec. 
ft. in. 
Revolutions 
per Minute. 
loz. 
o 5 f 
8-56 
llb. 
I 9 l 
34-26 
5lb. 
.... 40^ 
76-63 
lolb. 
5 
108-37 
J5lb. 
6 Ilf 
132-72 
2olb. 
.... 80^ 
153-26 
25lb. 
8 Ilf 
171-34 
3olb. 
9 
187-69 
35 lb. 
10 7t 
202-73 
qolb. 
II 4 i 
216-74 
45 lb. 
12 Of 
229-67 
5olb. 
12 8f 
242-31 
The pressures and velocities per second corresponding to these revo. 
lutions per minute may be found for any other radius-distance by 
multipljung the amounts in the first or second column respectively by 
that radius-distance in inches, and dividing by 6. Similarly, the 
numbers of the third column, multiplied by -^6, and divided by 
any radius-distance in inches, will give the revolutions required by 
that radius-distance to sustain the pressures of the first column. 
